The head of one of Canada’s largest banks is urging the federal government to stem the flow of investment capital from this country to the United States — because, he warns, it’s already leaving in “real time.”

RBC president and CEO Dave McKay discussed some of his biggest concerns about Canadian competitiveness, particularly those related to recent U.S. tax reforms, during a recent interview.

Ottawa has come under pressure from corporate Canada to respond to a U.S. tax overhaul that’s expected to lure business investments south of the border.

McKay told The Canadian Press that a “significant” investment exodus to the U.S. is already underway, especially in the energy and clean-technology sectors.